first patent in usa
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first patent in usa
first patent in the world
when was the first patent
when was the first patent issued
patent in united states
which us president signed the first patent
united states patent us
when did patents begin
when did patents start
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first patent in usa, first patent in the world, when was the first patent, when was the first patent issued, patent in united states, which us president signed the first patent, united states patent us, when did patents begin, when did patents start, when were patents created